Technical Parameters Parameter Category Specification Notes Base Device GSH203 AC Frame size interpretation: GSH203 typically indicates a frame size larger than GSH202 (200A). It commonly corresponds to a 250A or 300A frame contactor within the GSH series. Main Circuit Ratings   • Rated Operational Current (Ie) 250 A or 300 A (at AC-3, 400V) Exact value depends on the specific GSH203 sub-code. • Rated Operational Voltage (Ue) Up to 690 V AC Handle / Mounting Code -D40 Specific mechanical code. D often indicates a particular mounting style or accessory package. 40 is a variant code. This could denote a special side-mounted handle, a specific terminal configuration, or inclusion of certain base accessories. Critical Special Feature /0.03 Integrated 0.03A (30mA) fuse for the control coil circuit (terminals A1-A2). Control Coil Fuse (/0.03)  Core Safety & Reliability Feature • Purpose To protect the external control power source (PLC output, relay, control transformer) from damage in case of a short circuit in the contactor's coil or wiring. Prevents costly damage to control electronics. • Location Housed within a dedicated compartment on the contactor assembly. • Rating 30 mA, gG or similar characteristic. • Type Standard miniature fuse (e.g., 5x20mm). Control Coil AC (type specified). Coil voltage (e.g., 230V AC) is a separate specification not shown. Must be specified separately when ordering. Utilization Categories AC-3, AC-4, AC-1 For motor and heavy resistive load switching. Switching Capacity • Making Capacity (Icm): Very high, likely 2500-4000 A (peak). • Short-circuit Withstand: Requires backup fuse/circuit breaker. Mechanical Life ≥ 10 million operations Electrical Life (AC-3) ≥ 1.0 million operations at full rated current Auxiliary Contacts Modular blocks can be added (e.g., 2NO+2NC). Mounting Foot mounting or specific mounting per -D40 code. Terminals Large screw-clamp or busbar connections.